JPH05222719A - Reinforcing method of ground using large diameter tension reinforcing body - Google Patents
Reinforcing method of ground using large diameter tension reinforcing bodyInfo
- Publication number
- JPH05222719A JPH05222719A JP5654192A JP5654192A JPH05222719A JP H05222719 A JPH05222719 A JP H05222719A JP 5654192 A JP5654192 A JP 5654192A JP 5654192 A JP5654192 A JP 5654192A JP H05222719 A JPH05222719 A JP H05222719A
- Authority
- JP
- Japan
- Prior art keywords
- ground
- core material
- hollow
- reinforcing
- hollow rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、切土直後の地盤、ある
いは一般の地盤を補強するための補強方法に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing method for reinforcing ground immediately after cutting or general ground.
【０００２】[0002]
【従来の技術】切り取ったばかりの法面の崩壊を防止す
るため、あるいは一般の地盤を補強するための工法は各
種開発されている。2. Description of the Related Art Various methods have been developed to prevent collapse of a slope that has just been cut or to reinforce general ground.
【０００３】[0003]
【発明が解決しようとする問題点】しかし従来の技術で
は、たとえば利用中の鉄道のすぐ近くで工事をするよう
な場合には次のような問題点がある。 ＜イ＞周囲の地盤に影響を与えずに補強工事を行うこと
は困難である。 ＜ロ＞特に大きな直径で土砂を改良する方法であると、
周囲の土砂の崩壊を招きやすく危険である。 ＜ハ＞小さな直径で土砂を改良する方法であると、危険
性は少なくなるが施工に手間と時間がかかる。However, the conventional techniques have the following problems when, for example, construction is performed in the immediate vicinity of the railway being used. <B> It is difficult to carry out reinforcement work without affecting the surrounding ground. <B> If it is a method to improve the sand with a particularly large diameter,
It is dangerous because it may cause the surrounding sediment to collapse. <C> If it is a method of improving the earth and sand with a small diameter, the risk will be reduced, but the construction will take time and effort.
【０００４】[0004]
【本発明の目的】本発明はこのような点を改善するため
になされたもので、大口径の引張り補強体を用いて、安
全に地盤を補強する工法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in order to improve such points, and an object thereof is to provide a method for safely reinforcing the ground by using a tensile reinforcing body having a large diameter.
【０００５】[0005]
【問題点を解決するための手段】すなわち本発明は、中
空回転軸の周囲に掘削攪拌翼と設けた掘削攪拌ロッドを
地中に前進させ、同時に攪拌土とセメントミルクとを掘
削攪拌するステップと、中空ロッドの中空を通して配置
してあり、先端にスクリューを形成した棒状体からなる
芯材を回転させつつ、掘削攪拌した土砂範囲の最先端の
地盤に、中空ロッドの中空部を通して芯材を挿入するス
テップと、芯材を中心に残したまま、中空ロッドを逆回
転させ、先端からモルタルを吐出しつつ地中から取り出
すステップと、芯材の露出端を地盤側面に固定するステ
ップと、を有することを特徴とする大径引張り補強体を
用いた地盤の補強方法である。That is, the present invention comprises the steps of advancing an excavation stirring rod provided with an excavation stirring blade around a hollow rotating shaft into the ground, and at the same time excavating stirring soil and cement milk. , Which is placed through the hollow of the hollow rod, and while rotating the core material consisting of a rod-shaped body with a screw formed at the tip, insert the core material through the hollow part of the hollow rod into the cutting-edge ground of the excavated and stirred earth and sand range. With the core material left in the center, the hollow rod is rotated in the reverse direction and the mortar is discharged from the tip to be removed from the ground, and the exposed end of the core material is fixed to the ground side surface. This is a method for reinforcing the ground using a large-diameter tensile reinforcing body.
【０００６】[0006]
【作用】本発明は上記のような施工方法であるために、 ＜イ＞地盤を掘削しながら掘削土とセメントミルクを地
盤内で攪拌混合するので、周囲の地盤の崩落がなく、大
口径の引張り補強体を築造することが出来る。 ＜ロ＞掘削攪拌中空ロッドにより引張り補強体を築造す
る際、該ロッドの中空を通して芯材を引張り補強体の先
端部の地盤に挿入して芯材を引張り補強体の中心部に配
置することが出来る。 ＜ハ＞芯材の周辺はほとんど攪拌されないので、攪拌中
空ロッドの引き抜き時に吐出したモルタルで包囲され、
芯材と周囲の改良土砂とを強固に密着させることが出来
る。Since the present invention is the construction method as described above, <a> excavated soil and cement milk are stirred and mixed in the ground while excavating the ground, so that the surrounding ground does not collapse and a large diameter A tensile reinforcement can be built. <B> When constructing a tensile reinforcement body by a hollow rod for excavation and stirring, it is possible to insert the core material into the ground at the tip of the tensile reinforcement body through the hollow of the rod and place the core material in the central portion of the tensile reinforcement body. I can. <C> Since the periphery of the core material is hardly stirred, it is surrounded by the mortar discharged when the stirring hollow rod is pulled out.
It is possible to firmly adhere the core material and the surrounding improved earth and sand.
【０００７】[0007]
【実施例１】以下図面を参照しながら本発明の実施例に
ついて説明する。 ＜イ＞掘削攪拌中空ロッド 図１に本発明の施工方法に使用する掘削攪拌中空ロッド
１の一構成例を示す。掘削攪拌中空ロッド１は、中空の
回転軸１３の先端の周囲に、掘削翼１１、攪拌翼１２を
突設した装置である。回転軸１３は中空の長い筒体によ
って形成する。この回転軸１３の内部の中空部を通し
て、回転軸１３の後端からセメントミルクが供給された
り、芯材２が挿入される。中空回転軸１３の先端部には
中空部と連通している先端孔を開口する。この先端孔の
径は、後述する芯材２が通過できる程度の大きさに形成
する。そして回転軸１３の中空部の先端部は先端孔に向
けてすり付ける状態でテーパ状に形成する。さらに先端
孔の周囲にはセメントミルク吐出口を形成する。そのた
めに回転軸１３の中空部を通して供給したセメントミル
クはこの吐出口を通って掘削土に供給される。Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. <A> Drilling and stirring hollow rod FIG. 1 shows an example of the structure of the drilling and stirring hollow rod 1 used in the construction method of the present invention. The excavation stirring hollow rod 1 is a device in which an excavation blade 11 and a stirring blade 12 are projectingly provided around the tip of a hollow rotating shaft 13. The rotating shaft 13 is formed of a long hollow cylinder. Through the hollow portion inside the rotary shaft 13, cement milk is supplied from the rear end of the rotary shaft 13 or the core material 2 is inserted. A tip hole communicating with the hollow portion is opened at the tip of the hollow rotary shaft 13. The diameter of the tip hole is formed so that the core material 2 described later can pass therethrough. The tip of the hollow portion of the rotary shaft 13 is formed in a tapered shape in the state of being rubbed toward the tip hole. Further, a cement milk discharge port is formed around the tip hole. Therefore, the cement milk supplied through the hollow portion of the rotary shaft 13 is supplied to the excavated soil through this discharge port.
【０００８】中空回転軸１３の先端周辺部には掘削翼１
１を固定する。したがって回転軸１３の回転にともなっ
て地盤を掘削することができる。掘削翼１１の歯形は公
知のものを使用できるが、例えばスパイラル状になっ
て、複数に分割しておく。掘削翼１１は、掘削だけでな
く、掘削土とセメントミルクを攪拌すると共に掘削攪拌
中空ロッド１を逆回転させて引き出す際、掘削土とセメ
ントミルクの混合物を先端方向に押し戻す役割もしてい
る。The excavating blade 1 is provided around the tip of the hollow rotary shaft 13.
Fix 1 Therefore, the ground can be excavated as the rotary shaft 13 rotates. The tooth profile of the excavation blade 11 may be a known tooth profile, for example, it has a spiral shape and is divided into a plurality of parts. The excavation blade 11 not only excavates, but also functions to push the mixture of excavated soil and cement milk back toward the tip end when stirring the excavated soil and cement milk and pulling out the excavation stirring hollow rod 1 by rotating it in the reverse direction.
【０００９】掘削翼１１の後部で、中空回転軸１３の周
囲には攪拌翼１２を固定する。この翼によって、回転軸
１３の回転にともなって土とセメントミルクなどを攪拌
することができる。この攪拌翼１２は複数本の翼からな
り、形状はスパイラル状になっている。掘削翼１１と攪
拌翼１２の中間の位置には自由な回転を許容した状態
で、掘削翼１１や攪拌翼１２の直径よりも大きい直径の
共回り防止翼が中空中空ロッド１の周囲に配置されてい
る。この防止翼が両翼１１、１２の中間に位置している
ために、土砂が翼の回転といっしょに共回りすることが
阻止される。A stirring blade 12 is fixed around the hollow rotary shaft 13 at the rear of the excavation blade 11. With this blade, soil and cement milk can be stirred as the rotary shaft 13 rotates. The stirring blade 12 is composed of a plurality of blades and has a spiral shape. A co-rotation preventive blade having a diameter larger than the diameter of the excavating blade 11 or the stirring blade 12 is arranged around the hollow hollow rod 1 in a state where free rotation is allowed at an intermediate position between the excavating blade 11 and the stirring blade 12. Has been done. Since the protection wings are located between the wings 11 and 12, the sand and sand are prevented from rotating together with the rotation of the wings.
【００１０】＜ロ＞芯材２ 芯材２は先端にスクリュー２１を形成した棒状体であ
り、棒状部分は鉄筋、ＦＲＰ、カーボン、鋼管などを用
いる。この芯材２は事前に、中空回転軸１３の中空部を
通して配置してあり、先端に形成したスクリュー２１
は、回転軸１３の先端から外部に露出させてある。この
芯材２は、引っ張り強度が強く、その強度を長く持続で
き、酸化し難いものが特に望まれる。この芯材２を、後
述するように、芯材２を回転させつつ、掘削攪拌した土
砂範囲の最先端の地盤にスクリュ−をねじ込み固定す
る。<B> Core material 2 The core material 2 is a rod-shaped body having a screw 21 formed at its tip, and the rod-shaped portion is made of a reinforcing bar, FRP, carbon, steel pipe or the like. This core material 2 is arranged in advance through the hollow portion of the hollow rotary shaft 13, and the screw 21 formed at the tip
Is exposed to the outside from the tip of the rotary shaft 13. It is particularly desired that the core material 2 has a high tensile strength, can maintain the strength for a long time, and is hard to be oxidized. As will be described later, while rotating the core material 2, the screw is screwed and fixed to the most advanced ground in the earth and sand range that has been excavated and stirred.
【００１１】次に施工手順について説明する。 ＜イ＞掘削攪拌と吐出 先端から芯材２のスクリュ−を露出させて状態で、掘削
攪拌中空ロッド１の回転軸１３を回転する。すると攪拌
中空ロッド１は地盤を掘削しながら前進する。この際、
セメントミルクを回転軸１３の先端付近の吐出口から吐
出する。吐出と同時に回転軸１３が回転しているから、
掘削した土とこのセメントミルクが攪拌翼１２で攪拌さ
れる。その結果、土砂交じりモルタル（ソイルモルタ
ル）によって構成した直径の大きい補強体３が地中にで
きあがる。Next, the construction procedure will be described. <A> Excavation and stirring and discharge With the screw of the core material 2 exposed from the tip, the rotary shaft 13 of the excavation and stirring hollow rod 1 is rotated. Then, the stirring hollow rod 1 advances while excavating the ground. On this occasion,
Cement milk is discharged from the discharge port near the tip of the rotary shaft 13. Since the rotary shaft 13 is rotating at the same time as the discharge,
The excavated soil and this cement milk are stirred by the stirring blade 12. As a result, the reinforcing body 3 having a large diameter and made of soil-mixed mortar (soil mortar) is formed in the ground.
【００１２】＜ロ＞芯材２先端の定着 最深部まで掘削、攪拌が終了したら回転軸１３の回転を
とめる。そして回転軸１３を貫通して配置してあった芯
材２の尾端を把持して回転力を与える。 すると芯材２
の先端のスクリュ−が地盤に食い込み、改良範囲外の地
盤へ固定することができる。<B> Fixing of Tip of Core Material 2 When the excavation to the deepest part and the stirring are completed, the rotation of the rotary shaft 13 is stopped. Then, the tail end of the core material 2 arranged so as to pass through the rotary shaft 13 is gripped to apply a rotational force. Then core material 2
The screw at the tip of the bite cuts into the ground and can be fixed to the ground outside the improvement range.
【００１３】＜ハ＞攪拌中空ロッド１の引き抜き 次に回転軸１３に、掘進時とは反対方向の回転を与え
る。すると攪拌中空ロッド１は徐々に後退し、芯材２を
残した状態で外部に引き抜くことができる。この際に回
転速度と引抜き速度を適度に調整することにより、改良
された補強体３の土砂を先端に向けて圧縮する状態で中
空ロッド１を引抜くことができる。この場合に回転軸１
３の中心に位置していた芯材２は、先端がねじ込まれて
いるから、正確に補強体３の中心に位置したまま中空ロ
ッド１を引抜くことができ、芯材２の位置が中心から偏
ることがない。<C> Withdrawal of the stirring hollow rod 1 Next, the rotating shaft 13 is rotated in the direction opposite to the direction of excavation. Then, the stirring hollow rod 1 is gradually retracted and can be pulled out to the outside while leaving the core material 2. At this time, by appropriately adjusting the rotation speed and the drawing speed, the hollow rod 1 can be drawn while the soil of the improved reinforcement body 3 is compressed toward the tip. In this case the rotating shaft 1
Since the tip of the core material 2 located at the center of 3 is screwed in, the hollow rod 1 can be pulled out with the core material 2 accurately located at the center of the reinforcing body 3, and the position of the core material 2 is changed from the center. There is no bias.
【００１４】＜ホ＞モルタルの吐出 中空ロッド１を引抜くと、その容積分だけ土砂が不足す
ることになり、地中に空洞が生じると周囲の土砂を緩め
ることになる。そこで中空ロッド１の引抜きの際に、先
端付近からモルタルを吐出する。するとこのモルタルが
中空ロッド１引抜き後の土砂の不足分の容積を補うこと
になる。このモルタルの吐出した円柱部分は攪拌されて
いないから、芯材２の周囲は土砂があまり混じらない高
品質のモルタルで包囲された中央補強柱３１が構成され
る。<E> Discharge of mortar When the hollow rod 1 is pulled out, the volume of earth and sand becomes insufficient, and when a cavity is formed in the ground, the surrounding earth and sand is loosened. Therefore, when the hollow rod 1 is pulled out, mortar is discharged from near the tip. Then, this mortar supplements the volume of the insufficient soil after the hollow rod 1 is pulled out. Since the cylindrical portion from which the mortar has been discharged is not stirred, the core material 2 is surrounded by a central reinforcing column 31 surrounded by high-quality mortar that does not mix much soil.
【００１５】＜ヘ＞芯材２の緊張 中空ロッド１を引抜くと、周囲を補強された状態の芯材
２の尾端が孔外に露出する。その尾端を把持してジャッ
キによって引っ張り、所定の引っ張り翼を与えてアンカ
ーとしての作用を行う。<F> Tension of the core member 2 When the hollow rod 1 is pulled out, the tail end of the core member 2 with its periphery being reinforced is exposed outside the hole. The tail end is grasped and pulled by a jack, and a predetermined pulling wing is given to act as an anchor.
【００１６】本発明の施工方法は上記したようになるか
ら、次のような効果を達成することができる。 ＜イ＞従来のアンカーに比較して直径が大きく、その結
果、長さの短い補強体３を地中に構築することができ
る。したがってアンカーを施工位置を変えつつ多数本施
工する従来の方法に比較して効率のよい作業によって広
い範囲の地域の土砂の改良を行うことができる。 ＜ロ＞改良すべき土砂をまったく外部に持ち出すことな
く、作業を行うことができる。したがって鉄道や道路、
建築物に接近したような場所での作業のおいても周囲の
地盤を沈下させる危険がなく、安全に作業を行うことが
できる。 ＜ハ＞改良された補強体３は、中心部は濃度の高いモル
タルの中央補強柱、周囲は土砂とセメントミルクの混合
体、として構成することができる。したがって信頼性の
高い、高品質の補強体３を地中に構築することができ
る。 ＜ニ＞芯材２の先端にはねじを設けてある。したがって
中空の中空ロッド１を後退させるときに、先端を攪拌さ
れていない地盤にねじ込んだ芯材２を、その中心位置に
置いてくることができる。その結果、芯材２は常にほぼ
円柱状に改良した補強体３の中心に位置しており、緊張
を与えた場合にもその引っ張り力を確実に地盤に伝達し
て高い強度を得ることができる。 ＜ホ＞掘削攪拌中空ロッド１の引抜きの際に、回転速度
と引抜き速度を適度に調整することにより、改良された
補強体３の土砂を先端に向けて圧縮する状態で中空ロッ
ド１を引抜くことができる。したがって引抜きによって
も土砂は緩むことがなく、反対に圧縮されて締め固めら
れ、強固な補強体３を形成することができる。 ＜ヘ＞直径が大きく、長さが短かく、かつ信頼性の高い
補強体３を施工できる。その結果、狭い用地、高さに制
限のある用地においても容易に施工することができる。Since the construction method of the present invention is as described above, the following effects can be achieved. <A> The reinforcing body 3 has a larger diameter than that of the conventional anchor, and as a result, the reinforcing body 3 having a short length can be constructed in the ground. Therefore, compared with the conventional method of constructing a large number of anchors while changing the construction position, it is possible to improve the sediment in a wide range of area by an efficient work. <B> Work can be performed without bringing out the soil to be improved at all. Therefore, railways, roads,
Even when working near a building, there is no danger of sinking the surrounding ground and the work can be performed safely. <C> The improved reinforcing body 3 can be configured as a central reinforcing column of mortar having a high concentration in the central portion and a mixture of earth and sand and cement milk in the periphery. Therefore, the reliable and high-quality reinforcement body 3 can be built in the ground. <D> A screw is provided at the tip of the core material 2. Therefore, when the hollow hollow rod 1 is retracted, the core material 2 whose tip is screwed into the ground which is not stirred can be placed at the center position. As a result, the core material 2 is always located at the center of the reinforcing body 3 which has been improved into a substantially cylindrical shape, and even when tension is applied, the tensile force can be reliably transmitted to the ground to obtain high strength. .. <E> When the hollow rod 1 for excavating and stirring is pulled out, the hollow rod 1 is pulled out while the earth and sand of the improved reinforcement body 3 are compressed toward the tip by appropriately adjusting the rotation speed and the pulling speed. be able to. Therefore, even if the soil is pulled out, the earth and sand are not loosened, and are compressed and compacted in the opposite direction, so that a strong reinforcing body 3 can be formed. <F> The reinforcing body 3 having a large diameter, a short length and high reliability can be constructed. As a result, it can be easily constructed even in a narrow site or a site with a limited height.
【図１】 本発明の施工方法の説明図FIG. 1 is an explanatory diagram of a construction method of the present invention
【図２】 本発明の施工方法の説明図FIG. 2 is an explanatory diagram of a construction method of the present invention.
【図３】 本発明の施工方法の説明図FIG. 3 is an explanatory diagram of a construction method of the present invention.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田村 幸彦 神奈川県横浜市緑区桂台２−22−15−106 (72)発明者 福田 厚生 東京都港区赤坂２−４−１ 株式会社テノ ックス内 (72)発明者 吉田 茂 東京都港区赤坂２−４−１ 株式会社テノ ックス内 (72)発明者 上 周史 東京都港区赤坂２−４−１ 株式会社テノ ックス内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yukihiko Tamura 2-22-15-106 Katsuradai, Midori-ku, Yokohama-shi, Kanagawa (72) Inventor Fukuda Kosei 2-4-1 Akasaka, Minato-ku, Tokyo Tenox Co., Ltd. (72) Inventor Shigeru Yoshida 2-4-1, Akasaka, Minato-ku, Tokyo Inside Tenox Co., Ltd. (72) Inventor Shuji Kamis 2-4-1, Akasaka, Minato-ku, Tokyo Inside Tenox Co., Ltd.
Claims (1)
削攪拌ロッドを地中に前進させ、 同時に攪拌土とセメントミルクとを掘削攪拌するステッ
プと、 中空ロッドの中空部を通して配置してあり、先端にスク
リューを形成した棒状体からなる芯材を回転させて、掘
削攪拌した土砂範囲外の地盤に芯材を挿入するステップ
と、 芯材を中心に残したまま、中空ロッドを逆回転させ、先
端からモルタルを吐出しつつ地中から取り出すステップ
と、 該芯材の露出端を地盤側面に固定するステップと、 を有することを特徴とする大径引張り補強体を用いた地
盤の補強方法。1. A step of advancing an excavating stirring blade provided with an excavating stirring blade around a hollow rotating shaft into the ground, and at the same time excavating and stirring agitated soil and cement milk, and arranging through a hollow portion of the hollow rod. Yes, the step of rotating the core material consisting of a rod-shaped body with a screw formed at the tip to insert the core material into the ground outside the excavated and agitated soil range, and rotating the hollow rod in reverse while leaving the core material at the center. And a step of ejecting the mortar from the ground while discharging the mortar, and a step of fixing the exposed end of the core material to the side surface of the ground, and a method for reinforcing the ground using a large-diameter tensile reinforcing body. ..
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5654192A JP2619321B2 (en) | 1992-02-10 | 1992-02-10 | Ground reinforcement method using large diameter tensile reinforcement |
| US08/010,148 US5348424A (en) | 1992-02-07 | 1993-01-28 | Reinforcing block for excavation work and method of construction thereof |
| CA002088287A CA2088287C (en) | 1992-02-07 | 1993-01-28 | Reinforcing block for excavation work and method of construction thereof |
| DE69300529T DE69300529T2 (en) | 1992-02-07 | 1993-02-03 | Stiffening block for excavations and method of making the same. |
| EP93101650A EP0556642B1 (en) | 1992-02-07 | 1993-02-03 | Reinforcing block for excavation work and method of construction thereof |
| TW082105663A TW231320B (en) | 1992-02-07 | 1993-07-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5654192A JP2619321B2 (en) | 1992-02-10 | 1992-02-10 | Ground reinforcement method using large diameter tensile reinforcement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05222719A true JPH05222719A (en) | 1993-08-31 |
| JP2619321B2 JP2619321B2 (en) | 1997-06-11 |
Family
ID=13029950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5654192A Expired - Lifetime JP2619321B2 (en) | 1992-02-07 | 1992-02-10 | Ground reinforcement method using large diameter tensile reinforcement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2619321B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003119798A (en) * | 2001-10-19 | 2003-04-23 | Tenox Corp | Earthen floor concrete and its construction method |
| KR100433710B1 (en) * | 2001-11-08 | 2004-06-02 | 황문삼 | Removable Screw soil nailing method |
| KR100463752B1 (en) * | 2002-05-16 | 2004-12-29 | 권순갑 | a retaining wall construction system |
| JP2022167029A (en) * | 2021-04-22 | 2022-11-04 | アビエンジニアリング株式会社 | Anchor installation method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4591878B2 (en) * | 2004-02-10 | 2010-12-01 | 株式会社複合技術研究所 | Reinforcement structure of existing retaining wall and reinforcement method for existing retaining wall |
-
1992
- 1992-02-10 JP JP5654192A patent/JP2619321B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003119798A (en) * | 2001-10-19 | 2003-04-23 | Tenox Corp | Earthen floor concrete and its construction method |
| KR100433710B1 (en) * | 2001-11-08 | 2004-06-02 | 황문삼 | Removable Screw soil nailing method |
| KR100463752B1 (en) * | 2002-05-16 | 2004-12-29 | 권순갑 | a retaining wall construction system |
| JP2022167029A (en) * | 2021-04-22 | 2022-11-04 | アビエンジニアリング株式会社 | Anchor installation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2619321B2 (en) | 1997-06-11 |
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